gwt.xml's should behave like Web.gwt.xml, to make it easier to compare results

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@28483 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
Popup menu won't hide, if the mouse leaves the euclidian view. + some cleaning. (#2977)

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@28484 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e